special level fountain fix

special level fountain fix

     Add FOUNTAIN directives to the maps that just had '{' symbols.
Without them, the special level loader sets up those maps in a way
that prevents nethack from keeping the fountain counter accurately,
resulting in lack of fountain noises when they haven't been touched
yet and persistent noises after at least one of them has been dried
up.  (It would be better to fix lev_comp's map handling code to do
this automatically.)